Glass arm changing device for e.g. jewelry, has spring to rotate arm by quarter of turn when person applies pressure on spring, and pivot placed in concave part of wedge for rotating arm

摘要

The device has a case (1) integrated in a frame and having an opening (2) where a head of an arm is inserted. An internal movable part has a spring (18) and a wedge (19). The spring rotates the arm by quarter of a turn when a person applies pressure on the spring. A pivot (13) is placed in a concave part of the wedge for rotating the arm.